That is a 34-minute video on YouTube. There are some gems in the video that interest Second Life™ people.
I had not realized the first iteration of SL used a graphics engine designed to circumvent the Windows graphics and go directly to hardware. This go-to-hardware was the early game-graphics optimization used by most of the industry. That is long gone. Now OpenGL is the optimization that interfaces with all the various graphics systems in use with SL.
Inara covers the main parts SL’ers will find interesting. But, the video is loaded with tidbits about Second Life and how they are changing away from the problems with ideas for Sansar. So, some seldom talked about SL things are described in the video.
There is about 10+ minutes of tech description on Sansar and how it works. And toward the end some words on how they plan to adapt Second Life for life in the cloud.